Pinking-machine



(No Model.)

H. F. BLAKE.

PINKING MACHINE.

Patepfced Jan. 26, 1897.

UNiTnD STATES PATENT @Frisia HAROLD F. BLAKE, OF HAVERHILL, MASSACHUSETTS.

PINKlNG-MACHINE.

SPECIFICATION forming part Of Letters Patent N0. 575,821, dated January 26, 1897.

Application filed December 4, 1893. Serial No. 492,712. (No model.)

To all whom it may concern:

`Be it known that I, HAROLD F. BLAKE, of Haverhill, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Pinking-Ma-- chines, of which the following is a specification.

This invention relates to machines for ornamenting pieces of leather, such as parts of the uppers of boots and shoes, by the action of a wheel which cuts the leather in various 'ornament-al forms, the operation being usually known as pinking,A the rotary cutter being in some cases form ed to simply give the piece a serrated or pinked edge and in other cases to form the edge and also cut orifices in the leather back from the edge, while in some cases the vwheel simply cuts orifices without forming the edge. The work to be ornamented or cut is supported on a bed-roll, which is usually of elastic material, such as rubber, and bears against the cutter with a pressure due to its own elasticity, the bed-roll being in vertically-adjustable bearings, so v that it can be moved toward and from the cutter.

In ornamenting certain styles of boot and shoe uppers it is desirable to cut into the piece for a suitable distance and then arrest the cutting action before the piece has been cut entirely through; but with many machines as heretofore constructed it has been very inconvenient to do this, because of the time required to separate the bed-roll from the cutter.

lMy invention has for its object to provide a pinking machine with efficient means whereby it may be conveniently operated in such manner as to arrest the cutting action at any point and enable the piece to be removed from the machine before it has been entirely cut through, and without loss of time.

. The invention also has for its object to prevent the material from adhering to the cutter, particularly when the cutter is formed to perforate or make holes in the material.

To these ends the invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings,I forming part of this specification, Figurel represents ing-frame, having a fixed bearing a', in which is journaled the shaft b, supporting the cutter c, said cutter being rigidly attached to the shaft., so that it may be positively rotated thereby. The shaft is or may be rotated by means of a crank b. The cutter c may be formed, as above indicated, to pink or scallop the edge, orto form holes in the material at a distance from the edge, or to perform both operations.

cl represents the bed-roll, which is preferably madev of elastic material. such as rubber, and mounted upon a shaft d', which is journaled in bearings c' c, formed on a slide e, which is movable toward and from the cutter. The slide e is fitted to move in a guide a2 on the frame a.

In carrying out the first part of my invention I make the slide epfree to move in the guide a and provide a spring f, which 'is arranged to press said slide and the bed-roll d toward the cutter c. The upper end of said spring bears against the lower end of the slide c and its opposite end bears against a suitable support below the slide, the arrangement being such that the spring constantly exerts an upward pressure on the slide, which presses the roll d against the cutter c.

g represents a rod which is aflxed to the slide c and projects downwardly therefrom, said rod serving as a means for retracting or depressing the slide and the roll d, thus separating the latter from the cutter. The rod passes in this instance through the interior of the s pringf and through an orifice a3 in the base of the frame a and has at its lower end a ring or eye f, which may be connected bya rod f2 with a treadle, (not shown,) whereby the operator may conveniently and quickly depress the slide and the roll d. I do not of course limit myself to the rod g as the device IAO for depressing` the roll cl,but may use any other suitable means, such as a chain connected with the slide.

z' represents the support for the lower end of the spring f. Said support is preferably vertically adjustable, in order that the spring may be adjusted either to vary the pressure of the bed-roll against the cutter or to compensate for wear of the cutter caused bygrinding or for d ifferences in the sizes of cutters used interchangeably in the same machine. As here shown, the support i is a bar of metal having upwardly-proj eetin g screw-threaded .rods i i passing loosely through orifices in the frame a, and having their threaded upper ends provided with nuts 2 i2, bearing upon the frame c. lhen said nuts are turned, the support '1I is raised or lowered, as the ease may be, and

the spring correspondingly adjusted.

It will be seen that the opera-tor can readily stop the cutting operation before the piece of material has been cut entirely across from one edgeto another by depressing the slide eand roll d against the pressure of the spring, said slide and roll being immediately raised to opcutter having dies c, formed to cooperate with the bed-roll in cutting out pieces and forming ornamental holes in the material.

The entrance of the dies into the piece causes them to adhere to the piece, so that the piece is liable to follow the periphery of the dies as it passes from the bed-roll. To prevent this tendency and separate the piece from the dies after the cutting operation, I provide a stripper m, which is preferably a curved metal plate affixed to an arm or shank m', which is secured to the supporting-frame of the machine by suitable means. The stripper is preferably composed of two prongs or divisions 2 and 3, arranged at opposite sides of the dies, their lower ends being bent inwardly toward the axis ofthe cutter, so that they stand within the circle of the outer ends of the dies, as shown in Fig. 4, the outer portionof the stripper being outside of said eircle. This arrangement enables the stripper to bear on the upper side of the pieceof material at points near the meeting portions of the dies and the bed-roll, and thus separate the piece from the dies.

I prefer to make the part 3 adjustable toward and from the part 2 by means of a shank 4, affixed to the part 3 and secured to the part 2 by a screw 5, passing through a slot 6 in the shank 4, said slot and screw permitting the part 3 to be adjusted toward or from the part 2, so that the stripper can be adjusted to different sizes of cutters and different widths of dies c. The part 2 of the stripper is provided with a longitudinal slot 7, through which passes a screw S, which secures the stripper to the shank m. The slot '7 and screw 8 permit the acting lower ends of the parts of the stripper to be adjusted toward and from the meeting point of the dies and the bed-roll.

I claiml. In a pinking-machine, the combination of the supporting-frame having a fixed bearing a' and a fixed guide cr; a shaft b journaled in said bearing and provided with a rotary cutter having isolated cutting dies formed to cut through a piece of work; a slide e fitted to move in said guide; a bed-roll affixed to a shaft supported by bearin gs on said slide; a spring f interposed between the slide and an adjustable support i' on the frame of the machine and acting to press the bed-roll against the cutter; and a downwardly-projecting rod affixed to the slide, whereby the latter may be depressed to separate the bedroll from the cutter and permit the separation of the work from the cutter.

2. In a pinking-machine, the combination with a rotary cutter having projecting dies, of a segmental adjustable stripper having its outer portion located outside the circle of the outer ends of the dies and its inner endwithin said circle, whereby the stripper is enabled to separate from said dies the material pinked or perforated thereby, as set forth.

3. In a pinking-machine, the combination with a rotary wheel having projecting dies, of a segmental adjustable stripper composed of two parts or prongs located at opposite sides of the dies, the outer portion of the stripper being outside of the rcircle of the outer end of the dies while the acting ends of said prongs are within said circle, as set forth.

4. In a pinking-machine, the combination of the pinking-whcel having projecting dies, the fixed stripper composed of the parts 2 El adj ustablc toward and from each other7 and means for adjusting said stripper, the outer portion of the stripper being outside the eirclc of the outer ends of the dies, and its inner end within said circle, as setforth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 29th day of November, A. D. 1893.

HAROLD F. BLAKE.

lVitnesses:

C. F. BROWN, A. D. HARRISON.

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